Question:
Two integers are randomly selected from the set {1, 2, 3, 4
Last updated: 7/9/2022
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Two integers are randomly selected from the set {1, 2, 3, 4, 5, 6, 7, 8, 9) and are added together. Find the probability that their sum is 12 if they are selected (a) with replacement, (b) without replacement.